.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 80px;
    padding: 0 80px;
    box-sizing: border-box;
    background-color: rgba(21, 171, 133, .1);
    z-index: 999;

    .left {
        display: flex;
        align-items: center;

        h3 {
            font-size: 32px;
            color: #fff;
            line-height: 80px;
        }

        >img {
            display: block;
            width: 47px;
            margin-right: 10px;
        }
    }

    .right {
        display: flex;

        a {
            font-size: 16px;
            color: #ccc;
            &.active{
                color: #2AE073;
            }
        }

        i {
            display: block;
            width: 1px;
            height: 18px;
            margin: 0 18px;
            background-color: #2AE073;
            transform: rotate(30deg);
            -ms-transform: rotate(30deg);
            /* IE 9 */
            -moz-transform: rotate(30deg);
            /* Firefox */
            -webkit-transform: rotate(30deg);
            /* Safari 和 Chrome */
            -o-transform: rotate(30deg);
        }
    }

}

.section1 {
    background: url('../images/page1.png') no-repeat center;
    background-size: cover;

    .content1 {
        position: absolute;
        top: 270px;
        left: 50%;
        transform: translateX(-50%);
        color: #fff;
        text-align: center;

        >h3 {
            font-size: 56px;
        }

        >P {
            font-size: 24px;
            margin-top: 37px;
            margin-bottom: 50px;
        }

        >a {
            display: block;
            width: 240px;
            height: 68px;
            margin: 0 auto;
            border: 1px solid #fff;
            text-align: center;
            line-height: 68px;
            font-size: 30px;
            color: #fff;

            &:hover {
                background-color: rgba(255,255,255,.3);
            }
        }
    }

    .next-box {
        position: absolute;
        bottom: 32px;
        left: 50%;
        height: 80px;
        width: 100px;
        transform: translateX(-50%);
        color: #fff;
        font-size: 16px;
        font-weight: 300;
        text-align: center;

        >a {
            position: absolute;
            left: 50%;
            bottom: 0;
            transform: translateX(-50%);
            width: 100%;
            color: #fff;
            text-align: center;
        }

        img {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            animation: mymove 1s infinite;
            -webkit-animation: mymove 1s infinite;
        }

        @keyframes mymove {
            from {
                top: 0;
            }

            to {
                top: 10px;
            }
        }

        @-webkit-keyframes mymove

        /*Safari and Chrome*/
            {
            from {
                top: 0;
            }

            to {
                top: 10px;
            }
        }

    }
}

.section2 {
    background: url('../images/page2.png') no-repeat center;
    background-size: cover;

    .content2 {
        position: absolute;
        top: 130px;
        left: 50%;
        width: 1200px;
        transform: translateX(-50%);
        text-align: center;

        >h3 {
            font-size: 48px;
            color: #fff;
            margin-bottom: 26px;
        }

        p {
            font-size: 12px;
            color: #ccc;
            font-weight: 300;
            line-height: 24px;
        }

        .poster-main {
            margin-top: 120px;
        }

        .mask {
            display: none;
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, .6);
            z-index: 999;
            color: #2AE073;

            .mask-center {
                
                position: absolute;
                top: 50%;
                left: 50%;
                transform: translate(-50%, -50%);
                text-align: center;
                
                >a {

                    display: inline-block;
                    width: 140px;
                    height: 32px;
                    background: url(../images/page2-btn.png) no-repeat;
                    color: #2AE073;
                    line-height: 32px;
                    text-align: center;
                    font-size: 14px;
                }
            }
            .mask-center-list{
                position: absolute;
                top:0;
                left: 0;
                width: 100%;
                height: 100%;
                display: flex;
                justify-content: space-around;
                align-items: center;
                >div{
                    flex: 1;
                    text-align: center;
                    >img{
                        display: block;
                        width:80px;
                        margin:12px auto;
                    }
                    >p{
                        font-size: 16px;
                        color: #fff;
                    }
                    >.center-btn-list{
                        >a{
                            margin-right: 20px;
                            &:last-child{
                                margin-right: 0;
                            }
                        }
                    }
                }
                a {

                    display: inline-block;
                    width: 80px;
                    height: 24px;
                    margin-top:20px;
                    background: url(../images/page2-btn2.png) no-repeat;
                    color: #2AE073;
                    line-height: 24px;
                    text-align: center;
                    font-size: 14px;
                }
            }

        }

        .poster-item:hover {
            .mask {
                display: block;
            }
        }

        .btn-box {
            position: absolute;
            top: -90px;
            left: 50%;
            transform: translateX(-50%);
            display: table;
            z-index: 999;

            .index-btn {
                display: inline-block;
                padding: 0 14px;
                height: 48px;
                border: 1px solid rgba(153, 153, 153, .5);
                text-align: center;
                line-height: 48px;
                font-size: 14px;
                color: #ccc;
                margin-right: 10px;
                cursor: pointer;

                &:hover {
                    color: #2AE073;
                    border-color: #15AB85;
                }
            }
        }
    }




}

.section3 {
    background: url('../images/page3.png') no-repeat center;
    background-size: cover;

    .content3 {
        position: absolute;
        top: 130px;
        left: 50%;
        width: 1058px;
        transform: translateX(-50%);
        text-align: center;

        >h3 {
            font-size: 48px;
            color: #fff;
        }

        >.nav-list {
            margin-top: 40px;
            margin-bottom: 26px;

            a {
                display: inline-block;
                height: 48px;
                padding: 0 20px;
                color: #ccc;
                border: 1px solid rgba(204, 204, 204, .5);
                text-align: center;
                line-height: 48px;
                font-size: 14px;
                margin-right: 26px;

                &:last-child {
                    margin-right: 0;
                }

                &.active {
                    border: 1px solid #15AB85;
                    background-color: rgba(21, 171, 133, 0.3);
                    color: #2AE073;
                }
                &:hover {
                    border: 1px solid #15AB85;
                    color: #2AE073;
                }
            }
        }

        >p {
            font-size: 12px;
            color: #ccc;
        }

        >.list-box {
            display: flex;
            flex-wrap: wrap;
            margin-top: 48px;
            border-left: 1px solid rgba(21, 171, 133, 0.3);
            border-top: 1px solid rgba(21, 171, 133, 0.3);

            >li {
                width: 151px;
                height: 151px;
                border-right: 1px solid rgba(21, 171, 133, 0.3);
                border-bottom: 1px solid rgba(21, 171, 133, 0.3);
                background: url('../images/list-item.png') no-repeat;

                .item-box {
                    margin: 0 auto;
                    margin-top: 33px;
                    text-align: center;

                    >img {
                        display: block;
                        width: 64px;
                        margin: 0 auto;

                    }

                    p {
                        font-size: 14px;
                        color: #ccc;
                        margin-top: 20px;
                    }
                }
            }
        }

        >.list-change {
            position: relative;
            width: 1058px;
            height: 370px;
            margin-top: 30px;
            overflow: hidden;

            .circle-line {
                position: absolute;
                top: 40px;
                left: 50%;
                transform: translateX(-50%);
                width: 978px;
                height: 700px;
                border-radius: 50%;
                border: 1px dashed rgba(21, 171, 133, 0.5);
            }

            .change-item-box {
                .change-item {
                    position: absolute; 
                    left: 0;
                    top: 260px;
                    width: 110px;
                    height: 110px;
                    text-align: center;
                    border-radius: 50%;
                    background-color: #000;
                    border: 1px solid rgba(21, 171, 133, .4);
                    cursor: pointer;
                    overflow: hidden;

                    >.change-itemBg {
                        position: absolute;
                        top: 0;
                        left: 0;
                        transform: scale(0);
                        transition: all .6s;
                    }

                    // 点击
                    &.active {
                        border: 0;

                        .change-itemBg {
                            transform: scale(1);
                        }

                        >.item-text {
                            color: #2AE073;
                            font-weight: bold;
                        }
                    }

                    // 鼠标经过
                    &:hover {
                        Perspective: 200;
                        animation: myRotate 1s;
                        -moz-animation: myRotate 1s;
                        /* Firefox */
                        -webkit-animation: myRotate 1s;
                        /* Safari 和 Chrome */
                        -o-animation: myRotate 1s;

                        /* Opera */
                        @keyframes myRotate {
                            from {
                                transform: rotateY(0deg);
                            }

                            to {
                                transform: rotateY(360deg);
                            }
                        }

                        @-moz-keyframes myfirst

                        /* Firefox */
                            {
                                from {
                                    transform: rotateY(0deg);
                                }
    
                                to {
                                    transform: rotateY(80deg);
                                }
                        }

                        @-webkit-keyframes myfirst

                        /* Safari 和 Chrome */
                            {
                                from {
                                    transform: rotateY(0deg);
                                }
    
                                to {
                                    transform: rotateY(80deg);
                                }
                        }

                        @-o-keyframes myfirst

                        /* Opera */
                            {
                                from {
                                    transform: rotateY(0deg);
                                }
    
                                to {
                                    transform: rotateY(80deg);
                                }
                        }
                    }


                    >.item-text {
                        position: absolute;
                        left: 50%;
                        top: 50%;
                        transform: translate(-50%, -50%);
                        width: 98px;
                        color: #A9BACC;
                        line-height: 21px;
                        font-weight: 400;
                        font-size: 14px;
                    }

                    &.item1 {
                        top: 260px;
                        left: 0;
                    }

                    &.item2 {
                        left: 153px;
                        top: 80px;
                    }

                    &.item3 {
                        left: 365px;
                        top: 2px;
                    }

                    &.item4 {
                        left: 580px;
                        top: 2px;
                    }

                    &.item5 {
                        left: 800px;
                        top: 80px;
                    }

                    &.item6 {
                        left:946px;
                        top: 260px;
                    }

                }
            }

            .item-img-box {
                .item-img {
                    position: absolute;
                    bottom: -225px;
                    left: 50%;
                    transform: translateX(-50%);
                    width: 420px;
                    height: 225px;
                    border-radius: 4px;
                    overflow: hidden;
                    transition: all .3s;
                    >img {
                        display: block;
                        width: 100%;
                    }

                    &:hover {
                        .item-mask {
                            display: block;
                        }
                    }
                    
                    .item-mask {
                        display: none;
                        position: absolute;
                        top: 0;
                        left: 0;
                        width: 100%;
                        height: 100%;
                        background-color: rgba(0, 0, 0, .6);
                        text-align: center;

                        >.mask-center {
                            position: absolute;
                            top: 50%;
                            left: 50%;
                            transform: translate(-50%, -50%);

                            >a {
                                display: inline-block;
                                width: 100px;
                                height: 30px;
                                background: url('../images/page4-btn.png') no-repeat;
                                color: #2AE073;
                                text-align: center;
                                line-height: 30px;
                            }
                        }
                        >.mask-center-list{
                            position: absolute;
                            top:0;
                            left: 0;
                            width: 100%;
                            height: 100%;
                            display: flex;
                            justify-content: space-around;
                            align-items: center;
                            >div{
                                flex: 1;
                                text-align: center;
                                >img{
                                    display: block;
                                    width:80px;
                                    margin:12px auto;
                                }
                                >p{
                                    font-size: 16px;
                                    color: #fff;
                                }
                                >.center-btn-list{
                                    >a{
                                        margin-right: 20px;
                                        &:last-child{
                                            margin-right: 0;
                                        }
                                    }
                                }
                            }
                            a {
            
                                display: inline-block;
                                width: 80px;
                                height: 24px;
                                margin-top:20px;
                                background: url(../images/page2-btn2.png) no-repeat;
                                color: #2AE073;
                                line-height: 24px;
                                text-align: center;
                                font-size: 14px;
                            }
                        }
                    }
                }
            }
        }
    }
}

.section4 {
    background: url('../images/page4.png') no-repeat center;
    background-size: cover;
}